Inside the fishbowl, Wedeck speculates that the "interagency task force" is looking for a leak. Agent Seth McFarlane (welcome back, O agent we haven't seen since the pilot) asks why the FBI can't take care of this in-house and Janis echoes, "Yeah." Because they are all ace investigators, it does not take them long to figure out that Mark is somehow instigating this. His flouncing around the halls and glowering in their general direction every few moments might have tipped off the more observant.

Mark and Vogel go into Mark's office, which is being scoured for surveillance devices. Mark pissily notes this, and Vogel gives him a Shut up, Mark look before launching into a surprisingly melodious version of Stevie Wonder's "You Are the Sunshine of My Life." Mark is like, I work with lunatics, but it turns out that Vogel was singing because he suspected a voice-activated bug in Mark's office -- and sure enough, there was one tucked under the "M" key on Mark's keyboard. It's clever, Vogel explains, because "the office is swept for bugs at 4 a.m. No sound. No sound, no transmission." The question now is: Who has access to Mark's office and could have planted the bug? Why, everyone in the conference room. Let the interrogations begin!

Vogel heads into the room and shares: "Ladies and gentlemen, you may have deduced that we're closing in on a leak in the FBI that is hampering the Mosaic investigation. Anyone want to confess?" He gets no takers. So Demetri is the first up in the hot seat. He's hurt that Mark is seemingly okay with this.

Demetri starts off his talk with, "Vogel, you're a son of a bitch. You know that?" Vogel throws Mark under the bus with, "True as that may be, I'm working with Agent Benford today." Demetri gives Mark a death glare and Mark crumbles, as would anyone faced with John Cho's seething stares. He says feebly that he doesn't think Demetri's the mole, but he's got to send the message to the rest of the office that they're all suspect.

Inside the conference room, the we're-on-screen-but-rarely-speak agents are all fretting about how long this investigation could take. Marcie says, "It could take days. They're going to want to vet all of our personal files." Agent Seth McFarlane doctors his coffee as he snorts, "Not if they don't have passwords." Wedeck asks pointedly, "Is there something on your computer you don't want people to see?" And now everyone is interested in the discussion. Agent Seth McFarlane stammers his way around the question before admitting, "It's a role-playing game. I play 'Warlocks of Avalon' online. I'm a seventh-level druid, my name is Argothic --" Vreede breaks into snickers while Wedeck just looks disdainfully incredulous. The merriment is cut off as Mark comes in for Vreede. He takes off for the torture chamber while Mark pissily informs everyone of the transmitter in his keyboard, and leans in to Marcie to say, "You want to be useful? Tell me who put that in my office." Marcie -- who is now on her fourth line of the episode, or three more than she's had in the prior 14 put together -- asks incredulously if Mark thinks it was one of them. "That's the working theory," he replies drily. Simon picks up the key and says, "'M' for Mark. Nice touch. Unless it was you with 'M' for Marcie." She pettishly tells him to shut up. Simon tries to make nice by offering some sugar for her coffee, but Marcie eschews the white poison, thankyouverymuch. As Mark leaves, Marcie calls out, "We're with you. You know that." Mark's all, "Ech, say it in an e-card." After he goes, Simon remarks, "It's a good thing the fate of the planet doesn't depend on Mark Benford finding the mole." Okay, Simon, we get it: You have figured out who it is and are twitting everyone else for not being so smart as you.